Guiding device for long draft aprons



Jan. 31, 1933. J. A. JESSEN GUIDING DEVICE FOR LONG DRAFT APRONS Filed June 16, 1950 INVENTOR.

ATTORNEYS Patented Jan. 31, 1933 UNITED" STATES JOHN A. JESSEN, on VYHITINSVILLE, MASSACHUSETTS, ASSIGNOR To WRITIN- MACHINE worms, or wnrrmsvrnnn, rrasseonnsnr'rs, A oonrone'rro'n or Mes SAGHUSETTS GUIDING DEVICE non LONG nRAF'r nrzaoNsf Application filed. June 16,

This invention relates to the so-called long draft system of cotton spinning in which the cotton roving is supported between movable belts or aprons as it is advanced from the intermediate drawing rolls to the front drawing rolls in a spinning machine.

The sides of the supporting frames for the aprons are commonly recessed to slip over the lower intermediate drawing roll, around which the lower apron travels. This frame not only supports the aprons but also acts to guide the edges of the aprons.

The frame is not entirely effective and satisfactory for this latter purpose however, as the apron is free from the frame for a sub- I stan-tial portion of the periphery of the roll and has a marked tendency to crowd off to one side and to curl over the edge of the fluted portion of the roll as it passes the recess in the frame.

It is the object of my present invention to provide a device for supplementing the guiding action of the supporting frame and for preventing the apron from being displaced laterally as it passes the recess in the frame.

A further object isto provide a device for such purposes which is simple and inexpensive to construct and which is very easily ap plied to its intended uses.

My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claim.

A preferred form of the invention is shown in the drawing, in which Fig. 1 is a sectional end elevation of a set of drawing rolls with my improvements applied thereto;

Fig. 2 is a partial plan View, looking in direction of the arrow 2 in Fig. 1;

Fig. 3 is a side elevation of the supporting frame;

Fig. 4 is an end view of the guiding device;

Fig. 5 is a side elevation thereof, looking in the direction of the arrow 5 in Fig. 4; and

Fi 6 is a plan view of. a blank from which the guiding device may be formed.

Referring to Fig. 1, I have indicated back the drawing rolls 10 and 11, intermediate draw-- ing rolls 12 and 13 and front drawing rolls iaao. SerialNo. gene 7v.

'14 and 15. The rovingR is fed to the back drawing rolls lOand 11 and the yarn' Yris delivered from the front drawing rolls to the spinning mechanism.

A. supporting frame is mounted'on the intermediate drawing rolls 12a'ndf13 and comprises side members 20 and cross bars or connecting members 21 and 22. The side frame members 20 are provided with lower and up per recesses 1 23 and 24.1 The lower recesses 23 fit over the unfluted portions of-the lower intermediatedrawing roll 12 and therecesses 24 receive the corresponding portions ofthe upper intermediate drawing roll l3g, Aprons 30 and 31aremounted on the intermediaterolls 12 and 13 and are'guided around cross rods 32 and33 held against edge portions 34 of the side frame members 20 bythe belts 30 and 31. The cross bars 32 and 33 are vertically positioned and spaced apart by V-shaped lugs or projections 35 on the edge portions 34. i r, V I

The cross bars 32 and 33 may be formed as a single U-shaped member having the two guide portions connected at one end, as indicated at 37 (Fig. 2) and-having the opposite endsturned over, as indicated at38, to prevent lateral displacement.

With this construction, the aprons 30 and 31 are firmly supported in operative position,

' 23'leave the lower belt 30 unsupported for with paralleli'runs closely adjacent, andthey nearly half of the periphery of thedrawing roll 12. While passing these recesses, it has been found that the lower apron has a marked tendency to run sidewise and to curl downover the edge of the fluted portion of the drawing roll. In this way, the edge por-" tions of the apron soonbecome worn and irregular and it is necessary to replace the aprons before the other portions thereof show wear.

To prevent this axial displacement, I have and bridging the gap between adjacent por I fixed my signature.

comprising a middle orconnecting portion 40 and end guiding portions 41. The edges 42 and 43 of the portion 40 are bent down ward, as indicated in Fig. 4, and the end portions 41 are bent perpendicular to the con-v necting portion 40.

It will be noted that the end portions 41 e are "segmental in shape sothat when laced in the operative position indicated in ig. 1, these'end portions 41 cooperate with the side plates to form guiding surfaces entirely around the lower drawing roll 12."

The guiding device is' readily placed 1n position by hooking the ends 41 under the .drawing roll 12 and seating the connecting portion on the cross bar21 of the supporting frame. With this guiding device in place, axial displacementof the apron 30 y is "eliminated and the useful life of the apron is much prolonged. i

Having thus described my invention and the advantages thereof, I do not wish to, be limited to the details herein described, otherwise than as set forth in the claim, but what Iclaimis: .r a

- In a spinning framehaving upper and lowor drawing rolls upper and lower long draft aprons, and a separate supporting frame for each pair of said aprons with spaced side I plates, and with upper and lower cross bars connecting said side plates substantially at opposite sides of saidlower drawing roll, in combination, an apron guiding device mounted in said supporting frame between the side plates thereof and between said cross bars tions of said side plates, said guiding devices having portions between and abutting said upper and lower cross bars-and also partially I embracing said lower crossbar, and said guiding device'being securely held from displacement thereby but being detachable and {readily removable manually from guiding 3 position.

lntestlmony whereof 1 have hereunto af- P JOHN A. JEss'EN. 

